Abstract
It is well known that competition among kin alters the rate and often the direction of evolution in subdivided populations. Yet much remains unclear about the ecological and demographic causes of kin competition, or what role life cycle plays in promoting or ameliorating its effects. Using the multilevel Price equation, I derive a general equation for evolution in structured populations under an arbitrary intensity of kin competition. This equation partitions the effects of selection and demography, and recovers numerous previous models as special cases. I quantify the degree of kin competition, α, which explicitly depends on life cycle. I show how life cycle and demographic assumptions can be incorporated into kin selection models via α, revealing life cycles that are more or less permissive of altruism. As an example, I give closed-form results for Hamilton's rule in a three-stage life cycle. Although results are sensitive to life cycle in general, I identify three demographic conditions that give life cycle invariant results. Under the infinite island model, α is a function of the scale of density regulation and dispersal rate, effectively disentangling these two phenomena. Population viscosity per se does not impede kin selection.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 2840-2854 |
| Number of pages | 15 |
| Journal | Evolution |
| Volume | 64 |
| Issue number | 10 |
| DOIs | |
| State | Published - Oct 2010 |
| Externally published | Yes |
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Keywords
- Altruism
- Density dependence
- Dispersal
- Hard selection
- Kin selection
- Population viscosity
- Price equation
- Scale of competition
- Soft selection
- Subdivided populations
ASJC Scopus subject areas
- Agricultural and Biological Sciences(all)
- Ecology, Evolution, Behavior and Systematics
- Genetics
Cite this
The components of kin competition. / Van Dyken, James.
In: Evolution, Vol. 64, No. 10, 10.2010, p. 2840-2854.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - The components of kin competition
AU - Van Dyken, James
PY - 2010/10
Y1 - 2010/10
N2 - It is well known that competition among kin alters the rate and often the direction of evolution in subdivided populations. Yet much remains unclear about the ecological and demographic causes of kin competition, or what role life cycle plays in promoting or ameliorating its effects. Using the multilevel Price equation, I derive a general equation for evolution in structured populations under an arbitrary intensity of kin competition. This equation partitions the effects of selection and demography, and recovers numerous previous models as special cases. I quantify the degree of kin competition, α, which explicitly depends on life cycle. I show how life cycle and demographic assumptions can be incorporated into kin selection models via α, revealing life cycles that are more or less permissive of altruism. As an example, I give closed-form results for Hamilton's rule in a three-stage life cycle. Although results are sensitive to life cycle in general, I identify three demographic conditions that give life cycle invariant results. Under the infinite island model, α is a function of the scale of density regulation and dispersal rate, effectively disentangling these two phenomena. Population viscosity per se does not impede kin selection.
AB - It is well known that competition among kin alters the rate and often the direction of evolution in subdivided populations. Yet much remains unclear about the ecological and demographic causes of kin competition, or what role life cycle plays in promoting or ameliorating its effects. Using the multilevel Price equation, I derive a general equation for evolution in structured populations under an arbitrary intensity of kin competition. This equation partitions the effects of selection and demography, and recovers numerous previous models as special cases. I quantify the degree of kin competition, α, which explicitly depends on life cycle. I show how life cycle and demographic assumptions can be incorporated into kin selection models via α, revealing life cycles that are more or less permissive of altruism. As an example, I give closed-form results for Hamilton's rule in a three-stage life cycle. Although results are sensitive to life cycle in general, I identify three demographic conditions that give life cycle invariant results. Under the infinite island model, α is a function of the scale of density regulation and dispersal rate, effectively disentangling these two phenomena. Population viscosity per se does not impede kin selection.
KW - Altruism
KW - Density dependence
KW - Dispersal
KW - Hard selection
KW - Kin selection
KW - Population viscosity
KW - Price equation
KW - Scale of competition
KW - Soft selection
KW - Subdivided populations
UR - http://www.scopus.com/inward/record.url?scp=78649246251&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=78649246251&partnerID=8YFLogxK
U2 - 10.1111/j.1558-5646.2010.01033.x
DO - 10.1111/j.1558-5646.2010.01033.x
M3 - Article
C2 - 20482610
AN - SCOPUS:78649246251
VL - 64
SP - 2840
EP - 2854
JO - Evolution; international journal of organic evolution
JF - Evolution; international journal of organic evolution
SN - 0014-3820
IS - 10
ER -